EP2275246B1 - Zugvorrichtung für kunststofffolie - Google Patents

Zugvorrichtung für kunststofffolie Download PDF

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Publication number
EP2275246B1
EP2275246B1 EP09735493.0A EP09735493A EP2275246B1 EP 2275246 B1 EP2275246 B1 EP 2275246B1 EP 09735493 A EP09735493 A EP 09735493A EP 2275246 B1 EP2275246 B1 EP 2275246B1
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EP
European Patent Office
Prior art keywords
plastic film
drive means
board
longitudinally
retracted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09735493.0A
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English (en)
French (fr)
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EP2275246A1 (de
EP2275246A4 (de
Inventor
Mikio Totani
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Totani Corp
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Totani Corp
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Publication of EP2275246A4 publication Critical patent/EP2275246A4/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/256—Sheets, plates, blanks or films

Definitions

  • the invention relates to an apparatus for stretching a plastic film longitudinally thereof.
  • the apparatus includes heating means for heating and stretching the plastic film.
  • the plastic film is not always suitable for heating and stretching. In this connection, it is desired to stretch the plastic film in a way different from the apparatus.
  • JPS4913503B Another prior art apparatus is disclosed in JPS4913503B .
  • the apparatus includes plastic film feeding means by which the plastic film is fed longitudinally thereof and intermittently, the plastic film having opposite surfaces and opposite side edges.
  • the apparatus further includes a stretching member and a board disposed on opposite sides of the plastic film to be opposed to the surfaces of the plastic film and to each other when the plastic film is fed longitudinally thereof.
  • the apparatus further includes drive means by which the stretching member is advanced toward the board to be pressed against the plastic film and the board between the side edges of the plastic film to stretch the plastic film longitudinally thereof when the plastic film is stopped temporarily. The stretching member is then retracted from the board and kept apart from the plastic film.
  • the stretching member comprises a plate including a tapered linear edge and extending widthwise of the plastic film.
  • the linear edge is opposed to the board.
  • the plate is advanced toward the board so that the linear edge can be pressed against the plastic film between the side edges of the plastic film.
  • the plate is then retracted from the board so that the linear edge can be kept apart from the board.
  • the plate may be moved slightly and longitudinally of the plastic film after being retracted and then advanced and retracted again.
  • the plate may be moved slightly, advanced and retracted at few times during the plastic film is stopped temporarily.
  • a plurality of cylinders may be arranged widthwise of the plastic film and connected to the plate so that the plate can be advanced by the cylinders.
  • the stretching member comprises a plurality of rollers each of which includes a circumferential edge having a circular axial section.
  • the rollers are arranged widthwise of the plastic film and mounted on a beam.
  • the circumferential edge is opposed to the board.
  • the beam is advanced toward the board to make the circumferential edge pressed against the plastic film between the side edges of the plastic film.
  • the beam is then moved widthwise of the plastic film so that the rollers can be rolled widthwise of the plastic film.
  • the beam is then retracted from the board so that the circumferential edge can be kept apart from the plastic film.
  • the rollers may be arranged at a pitch.
  • the beam is moved at a stroke corresponding to the pitch so that the rollers can be rolled at the stroke corresponding to the pitch.
  • the beam may be moved back to the original position after being retracted.
  • the beam is then advanced, moved and retracted again.
  • the beam may be advanced, moved and retracted at few times during the plastic film is stopped temporarily.
  • a plurality of rollers may be overlapped with each other axially thereof and mounted on the beam.
  • the stretching member comprises an elongated rod extending widthwise of the plastic film.
  • the rod is advanced toward the board to be pressed against the plastic film between the side edges of the plastic film.
  • the rod is then retracted from the board and kept apart from the plastic film.
  • the rod may be moved slightly and longitudinally of the plastic film after being retracted. The rod is then advanced and retracted again.
  • the rod may be moved slightly, advanced and retracted at few times during the plastic film is stopped temporarily.
  • the stretching member includes an elongated rod extending widthwise of the plastic film and opposed to the board.
  • a plurality of rollers are arranged widthwise of the plastic film, mounted on a beam and engaged with the rod.
  • the beam is advanced toward the board so that the rod can be pressed against the plastic film by the rollers.
  • the beam is then moved longitudinally of the plastic film so that the rod can be guided by the rollers to be rolled longitudinally of the plastic film.
  • the beam is then retracted from the board so that the rod can be kept apart from the plastic film.
  • the stretching member comprises a plate including an end portion at which a curved surface is formed to be curved about a center and opposed to the board.
  • the plate is advanced toward the board to make the curved surface pressed against the plastic film between the side edges of the plastic film.
  • the plate is then moved swingingly about the center of the curved surface to be rolled longitudinally of the plastic film.
  • the plate is then retracted from the board so that the curved surface can be kept apart from the plastic film.
  • Embodiments of the invention are as follows.
  • Fig. 1 illustrates an apparatus 1 according to the invention.
  • the apparatus 1 is incorporated into an installation for successively making plastic bags in which two plastic films 2 and 3 are supplied from rolls 4 and 5 and accumulated in accumulators 6 and 7.
  • One of the plastic films 2 is then directed to turn bars 8 and 9 to be changed in direction and disposed on the upper side of the other plastic film 3.
  • the apparatus 1 includes plastic film feeding means comprising feed rollers 10 and combined with the apparatus 1, one of the plastic films 2 being directed to a dancer roller 11, a mark sensor 12, the apparatus 1 and the feed rollers 10.
  • the other plastic film 3 is directed to a dancer roller 13 and the feed rollers 10.
  • the plastic films 2 and 3 are superposed on each other when being directed to the feed rollers 10.
  • the apparatus 1 is arranged to stretch the plastic film 2 longitudinally thereof.
  • the feed rollers 10 are rotated by a drive motor so that the plastic films 2 and 3 can be fed longitudinally thereof and intermittently and stopped temporarily.
  • the plastic films 2 and 3 are fed in a direction X which is horizontal.
  • the plastic films 2 and 3 are heat sealed with each other by heat seal means and then cut by a cutter whenever being fed intermittently and when being stopped temporarily to successively make plastic bags, as in the case of the installation of Japanese Laid-Open Patent Publication No. 48,260 of 2003 .
  • the dancer rollers 11 and 13 give the plastic films 2 and 3 tensions.
  • Each of the plastic films 2 and 3 has a pattern printed thereon and a mark placed thereon repeatedly at a pitch.
  • the mark sensors 12 detect the marks of the plastic films 2 and 3 to generate signals.
  • the apparatus 1 stretches one of the plastic films 2 longitudinally thereof in response to the signals to correct the pitch at which the pattern is printed on the plastic film 2 repeatedly, resulting in no discrepancy in pattern between the plastic films 2 and 3.
  • the apparatus 1 includes a stretching member comprising a plate 14, as shown in Fig. 2 .
  • the plastic film 2 has opposite surfaces and opposite side edges.
  • the plate 14 and a board 15 are disposed on opposite sides of the plastic film 2 in a direction Z of thickness of the plastic film 2 to be opposed to the surfaces of the plastic film 2 and to each other when the plastic film 2 is fed longitudinally thereof.
  • the apparatus 1 further includes drive means 17 connected to the plate 14. The plate 14 is advanced toward the board 15 by the drive means 17 to be pressed against the plastic film 2 and the board 15 between the side edges of the plastic film 2 to stretch the plastic film 2 longitudinally thereof when the plastic film 2 is stopped temporarily. The plate 14 is then retracted from the board 15 and kept from the plastic film 2.
  • the plate 14 includes a tapered linear edge 16 and extends widthwise of the plastic film 2.
  • the drive means 17 comprises a servo motor and a linkage.
  • the liner edge 16 is opposed to the board 15.
  • the plate 14 is advanced toward the board 15 in the direction Z so that the linear edge 16 can be pressed against the plastic film 2 between the side edges of the plastic film 2.
  • the plate 14 is then retracted from the board 15 so that the linear edge 16 can be kept apart from the board 15.
  • the linear edge 16 is curved along a circle having a radius of about 0.5 mm.
  • the apparatus can therefore stretch the plastic film 2 smoothly when the linear edge 16 is pressed against the plastic film 2.
  • the apparatus further includes additional drive means 18 by which the plate 14 is moved slightly and longitudinally of the plastic film 2 or in the direction X'.
  • the additional drive means 18 is connected to the drive means 17 and the plate 14.
  • a control device 19 is connected to the drive means 17 and the additional drive means 18. The drive means 17 and the additional drive means 18 are controlled by the control device 19 so that the plate 14 can be moved slightly and longitudinally of the plastic film 2 by the additional drive means 18 after being retracted and then advanced and retracted again. The plate 14 is moved slightly, advanced and retracted at few times during the plastic film 2 is stopped temporarily.
  • the apparatus can therefore stretch the plastic film 2 effectively.
  • the plate 14 may be stopped by a stop when being advanced toward the board 15.
  • the drive means comprises a plurality of cylinders 20 arranged widthwise of the plastic film 2 and connected to the plate 14 so that the plate 14 can be advanced by the cylinders 20.
  • the cylinders 20 comprise air cylinders or electric cylinders.
  • the cylinders 20 are arranged at a pitch P of about 100 mm.
  • the plate 14 can therefore be advanced exactly so that the linear edge 16 can be pressed exactly.
  • the stretching member comprises a plurality of rollers 21 each of which includes a circumferential edge 22 having a circular axial section.
  • the rollers 21 are arranged widthwise of the plastic film 2 or in a direction Y and mounted on a beam 23 for rotation.
  • the circumferential edge 22 is opposed to the board 15.
  • the drive means 17 is connected to the beam 23.
  • the apparatus further includes additional drive mans 18 by which the beam 23 is moved widthwise of the plastic film or in the direction Y.
  • a control device 19 is connected to the drive means 17 and the additional drive means 18.
  • the drive means 17 and the additional drive means 18 are controlled by the control device 19 so that the beam 23 can be advanced toward the board 15 to make the circumferential edge 22 pressed against the plastic film 2 between the side edges of the plastic film 2.
  • the beam 23 is then moved widthwise of the plastic film or in the direction Y by the additional drive means 18 so that the rollers 21 can be rolled widthwise of the plastic film 2.
  • the beam 23 is then retracted from the board 15 so that the circumferential edge 22 can be kept apart from the plastic film 2.
  • the rollers 21 are arranged at a pitch of about 34 mm.
  • the beam 23 is advanced in the direction Z so that the rollers 21 can be pressed against the plastic film 2.
  • the beam 23 is then moved widthwise of the plastic film 2 and at a stroke of about 34 mm so that the rollers 21 can be rolled widthwise of the plastic film 2 to stretch the plastic film 2.
  • the beam 23 is then retracted from the board 15 to make the rollers 21 kept apart from the plastic film 2.
  • the beam 23 is moved back widthwise of the plastic film 2 to the original position after being retracted.
  • the beam 23 is then advanced, moved and retracted again.
  • the beam 23 may be advanced, moved and retracted at few times during the plastic film 2 is stopped temporarily.
  • Each of the rollers 21 has a diameter D of about 8 mm and a thickness T of about 0.5 mm.
  • the circular edge 22 is curved along a circle having a radius of about 0.25 mm.
  • the beam 23 may be moved slightly and longitudinally of the plastic film 2 or in a direction X' and moved in the direction Z whenever being moved slightly so that the rollers 21 can be pressed against the plastic film 2 at few times.
  • a plurality of rollers 21 may be overlapped with each other axially thereof and mounted on the beam 23.
  • the stretching member comprises an elongated rod 24 extending widthwise of the plastic film 2 or in the direction Y and opposed to the board 15.
  • a plurality of rollers 25 are arranged widthwise of the plastic film 2, mounted on a beam 26 and engaged with the rod 24.
  • the beam 26 is advanced toward the board 15 so that the rod 24 can be pressed against the plastic film 2 by the rollers 25 between the side edges of the plastic film 2.
  • the beam 26 is then moved longitudinally of the plastic film 2 or in the direction X' so that the rod 24 can be guided by the rollers 25 to be rolled longitudinally of the plastic film 2.
  • the beam 26 is then retracted from the board 15 so that the rod 24 can be kept apart from the plastic film 2.
  • the beam 26 may be moved slightly and longitudinally of the plastic film 2 or in the direction X' and moved in the direction Z whenever being moved slightly so that the rod 24 can be pressed against the plastic film 2 at few times.
  • the beam 26 may be moved slightly and longitudinally of the plastic film 2 when the rod 24 is pressed so that the rod 24 can be pressed against and rolled along the plastic film 2.
  • the stretching member comprises a plate 27 including an end portion at which a curved surface 28 is formed to be curved about a center and opposed to the board 15.
  • the plate 27 is advanced toward the board 15 to make the curved surface 28 pressed against the plastic film 2 between the side edges of the plastic film 2.
  • the plate 27 is then moved swingingly about the center of the curved surface 28 to be rolled longitudinally of the plastic film 2.
  • the plate 27 is then retracted from the board 15 so that the curved surface 28 can be kept apart from the plastic film 2.
  • the plate 28 is fixed to trunnions which are supported by bearings 29 for rotation about a center aligned with the center of the curved surface 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (12)

  1. Vorrichtung (1) zum Strecken einer Kunststofffolie (2) in ihrer Längsrichtung, welche Vorrichtung (1) aufweist:
    Kunststofffolien-Zuführungsmittel, durch die die Kunststofffolie (2) in ihrer Längsrichtung und intermittierend zugeführt wird, wobei die Kunststofffolie (2) entgegengesetzte Oberflächen und entgegengesetzte Seitenkanten hat;
    ein Streckteil und ein Tisch (15), die auf entgegengesetzten Seiten der Kunststofffolie (2) angeordnet sind, um den Oberflächen der Kunststofffolie (2) und einander gegenüberzuliegen, wenn die Kunststofffolie (2) in ihrer Längsrichtung zugeführt wird; und
    Antriebsmittel (17), durch die das Streckteil zu dem Tisch (15) hin bewegt wird, um gegen die Kunststofffolie (2) und den Tisch (15) zwischen den Seitenkanten des Kunststofffilms (2) gedrückt zu werden, um die Kunststofffolie (2) in ihrer Längsrichtung zu strecken, wenn die Kunststofffolie (2) vorübergehend angehalten wird, wobei das Streckteil dann durch die Antriebsmittel (17) von dem Tisch (15) zurückgezogen und im Abstand von der Kunststofffolie (2) gehalten wird,
    wobei das Streckteil eine Platte (14) aufweist, die eine spitze lineare Kante (16) enthält und sich in Breitenrichtung der Kunststofffolie (2) erstreckt, die lineare Kante (16) dem Tisch (15) gegenüberliegt, die Platte (14) so zu dem Tisch (15) hin bewegt wird, dass die lineare Kante (16) gegen die Kunststofffolie (2) zwischen den Seitenkanten der Kunststofffolie (2) gedrückt werden kann, die Platte (14) dann von dem Tisch (15) zurückgezogen wird, so dass die lineare Kante (16) im Abstand von dem Tisch (15) gehalten werden kann,
    dadurch gekennzeichnet, dass die Vorrichtung (1) weiterhin aufweist:
    zusätzliche Antriebsmittel (18), durch die die Platte (14) geringfügig und in Längsrichtung der Kunststofffolie (2) bewegt wird; und
    eine Steuervorrichtung (19), die mit den Antriebsmitteln (17) und den zusätzlichen Antriebsmitteln (18) verbunden ist, wobei die Antriebsmittel (17) und die zusätzlichen Antriebsmittel (18) so durch die Steuervorrichtung (19) gesteuert werden, dass die Platte (14) geringfügig durch die zusätzlichen Antriebsmittel (18) bewegt werden kann, nachdem sie zurückgezogen und dann vorwärts bewegt und wieder zurückgezogen wurde.
  2. Vorrichtung (1) nach Anspruch 1, bei der die Platte (14) einige Male geringfügig bewegt, vorwärts bewegt und zurückgezogen wird, während die Kunststofffolie (2) vorübergehend angehalten ist.
  3. Vorrichtung (1) zum Strecken einer Kunststofffolie (2) in ihrer Längsrichtung, welche Vorrichtung (1) aufweist:
    Kunststofffolien-Zuführungsmittel, durch die die Kunststofffolie (2) in ihrer Längsrichtung und intermittierend zugeführt wird, wobei die Kunststofffolie (2) entgegengesetzte Oberflächen und entgegengesetzte Seitenkanten hat;
    ein Streckteil und einen Tisch (15), die auf entgegengesetzten Seiten der Kunststofffolie (2) angeordnet sind, um den Oberflächen der Kunststofffolie (2) und einander gegenüberzuliegen, wenn die Kunststofffolie (2) in ihrer Längsrichtung zugeführt wird; und
    Antriebsmittel (17), durch die das Streckteil zu dem Tisch (15) hin vorwärts bewegt wird, um gegen die Kunststofffolie (2) und den Tisch (15) zwischen den Seitenkanten der Kunststofffolie (2) gedrückt zu werden, um die Kunststofffolie (2) in ihrer Längsrichtung zu strecken, wenn die Kunststofffolie (2) vorübergehend angehalten ist, wobei das Streckteil dann durch die Antriebsmittel (17) von dem Tisch (15) zurückgezogen und im Abstand von der Kunststofffolie (2) gehalten wird,
    dadurch gekennzeichnet, dass das Streckteil mehrere Rollen (21) aufweist, von denen jede eine Umfangskante (22) mit einem kreisförmigen axialen Querschnitt hat, die Rollen (21) in Breitenrichtung der Kunststofffolie (2) angeordnet und an einem Träger (23) befestigt sind, die Umfangskante (22) dem Tisch (15) gegenüberliegt und die Antriebsmittel (17) mit dem Träger (23) verbunden sind, welche Vorrichtung (1) weiterhin aufweist:
    zusätzliche Antriebsmittel (18), durch die der Träger (23) in Breitenrichtung der Kunststofffolie (2) bewegt wird; und
    eine Steuervorrichtung (19) mit den Antriebsmitteln (17) und den zusätzlichen Antriebsmitteln (18) verbunden ist, die Antriebsmittel (17) und die zusätzlichen Antriebsmittel (18) von der Steuervorrichtung (19) so gesteuert werden, dass der Träger (23) zu dem Tisch (15) hin vorwärts bewegt werden kann, um zu bewirken, dass die Umfangskante (22) zwischen den Seitenkanten der Kunststofffolie (2) gegen die Kunststofffolie (2) gedrückt wird, der Träger (23) dann durch die zusätzlichen Antriebsmittel (18) so bewegt wird, dass die Rollen (21) in Breitenrichtung auf der Kunststofffolie (2) gerollt werden können, und der Träger (23) dann von dem Tisch (15) so zurückgezogen wird, dass die Umfangskante (22) im Abstand von der Kunststofffolie (2) gehalten werden kann.
  4. Vorrichtung (1) nach Anspruch 3, bei der die Rollen (21) in einem Abstand (P) angeordnet sind, der Träger (23) mit einem Hub entsprechend dem Abstand (P) bewegt wird, so dass die Rollen (21) mit dem Hub entsprechend dem Abstand (P) gerollt werden können.
  5. Vorrichtung (1) nach Anspruch 4, bei der der Träger (23) zurück zu der Ausgangsposition bewegt wird, nachdem er zurückgezogen, der Träger (23) dann vorwärts bewegt und wieder zurückgezogen wurde.
  6. Vorrichtung (1) nach Anspruch 5, bei der der Träger (23) einige Male vorwärts bewegt und zurückgezogen wird, während die Kunststofffolie (2) vorübergehend angehalten ist.
  7. Vorrichtung (1) nach Anspruch 3, bei der mehrere Rollen (21) in ihrer Axialrichtung einander überlappen und an dem Träger (23) befestigt sind.
  8. Vorrichtung (1) zum Strecken einer Kunststofffolie (2) in ihrer Längsrichtung, welche Vorrichtung (1) aufweist:
    Kunststofffolien-Zuführungsmittel, durch die die Kunststofffolie (2) in ihrer Längsrichtung und intermittierend zugeführt wird, wobei die Kunststofffolie (2) entgegengesetzte Oberflächen und entgegengesetzte Seitenkanten hat;
    ein Streckteil und einen Tisch (15), die auf entgegengesetzten Seiten der Kunststofffolie (2) angeordnet sind, um den Oberflächen der Kunststofffolie (2) und einander gegenüberzuliegen, wenn die Kunststofffolie (2) in ihrer Längsrichtung zugeführt wird; und
    Antriebsmittel (17), durch die das Streckteil zu dem Tisch (15) hin vorwärts bewegt wird, um gegen die Kunststofffolie (2) und den Tisch (15) zwischen den Seitenkanten der Kunststofffolie (2) gedrückt zu werden, um die Kunststofffolie (2) in ihrer Längsrichtung zu strecken, wenn die Kunststofffolie (2) vorübergehend angehalten ist, wobei das Streckteil dann durch die Antriebsmittel (17) von dem Tisch (15) zurückgezogen und im Abstand von der Kunststofffolie (2) gehalten wird,
    dadurch gekennzeichnet, dass das Streckteil einen länglichen Stab (24) aufweist, der sich in Breitenrichtung der Kunststofffolie (2) erstreckt, wobei der Stab (24) zu dem Tisch (25) hin vorwärts bewegt wird, um zwischen Seitenkanten der Kunststofffolie (2) gegen die Kunststofffolie (2) gedrückt zu werden, der Stab (24) dann von dem Tisch (15) zurückgezogen und im Abstand von der Kunststofffolie (2) gehalten wird.
  9. Vorrichtung (1) nach Anspruch 8, weiterhin aufweisend:
    zusätzliche Antriebsmittel (18), durch die der Stab (24) geringfügig und in Längsrichtung der Kunststofffolie (2) bewegt wird; und
    eine Steuervorrichtung (19), die mit den Antriebsmitteln (17) und den zusätzlichen Antriebsmitteln (18) verbunden ist, wobei die Antriebsmittel (17) und die zusätzlichen Antriebsmittel (18) so durch die Steuervorrichtung (19) gesteuert werden, dass der Stab (24) durch die zusätzlichen Antriebsmittel (18) geringfügig bewegt werden kann, nachdem er zurückgezogen wurde, und der Stab (24) dann wieder vorwärts bewegt und zurückgezogen wird.
  10. Vorrichtung (1) nach Anspruch 9, bei der der Stab (24) geringfügig bewegt, wenige Male vorwärts bewegt und zurückgezogen wird, während die Kunststofffolie (2) vorübergehend angehalten ist.
  11. Vorrichtung (1) nach Anspruch 8, bei der der Stab (24) dem Tisch (15) gegenüberliegt, mehrere Rollen (25) in Breitenrichtung der Kunststofffolie (2) an einem Träger (26) befestigt und mit dem Stab (24) in Eingriff sind, und die Antriebsmittel (17) mit dem Träger (26) verbunden sind, wobei die Vorrichtung (1) weiterhin aufweist:
    zusätzliche Antriebsmittel (18), durch die der Träger (26) in Längsrichtung der Kunststofffolie (2) bewegt wird; und
    eine Steuervorrichtung (19), die mit den Antriebsmitteln (17) und den zusätzlichen Antriebsmitteln (18) verbunden ist, wobei die Antriebsmittel (17) und die zusätzlichen Antriebsmittel (18) so durch die Steuervorrichtung (19) gesteuert werden, dass der Träger (26) so zu dem Tisch (15) hin vorwärts bewegt werden kann, dass der Stab (24) durch die Rollen (25) gegen die Kunststofffolie (2) gedrückt werden kann, der Träger (26) dann durch die zusätzlichen Antriebsmittel (18) so bewegt wird, dass der Stab (24) durch die Rollen (25) so geführt werden kann, dass er in Längsrichtung der Kunststofffolie (2) gerollt wird, und der Träger (26) dann von dem Tisch (15) zurückgezogen wird, so dass der Stab (24) im Abstand von der Kunststofffolie (2) gehalten werden kann.
  12. Vorrichtung (1) zum Strecken einer Kunststofffolie (2) in ihrer Längsrichtung, welche Vorrichtung (1) aufweist:
    Kunststofffolien-Zuführungsmittel, durch die die Kunststofffolie (2) in ihrer Längsrichtung und intermittierend zugeführt wird, wobei die Kunststofffolie (2) entgegengesetzte Oberflächen und entgegengesetzte Seitenkanten hat;
    ein Streckteil und einen Tisch (15), die auf entgegengesetzten Seiten der Kunststofffolie (2) angeordnet sind, um zu den Oberflächen der Kunststofffolie (2) und zueinander entgegengesetzt zu sein, wenn die Kunststofffolie (2) in ihrer Längsrichtung zugeführt wird; und
    Antriebsmittel (17), durch die das Streckteil zu dem Tisch (15) hin vorwärts bewegt wird, um gegen die Kunststofffolie (2) und den Tisch (15) zwischen den Seitenkanten der Kunststofffolie (2) gedrückt zu werden, um die Kunststofffolie (2) in ihrer Längsrichtung zu strecken, wenn die Kunststofffolie (2) vorübergehend angehalten ist, wobei das Streckteil dann durch die Antriebsmittel (17) von dem Tisch (15) zurückgezogen und im Abstand von der Kunststofffolie (2) gehalten wird,
    dadurch gekennzeichnet, dass das Streckteil eine Platte (27) aufweist, die einen Endbereich enthält, an dem eine gekrümmte Oberfläche (28) gebildet ist, um um eine Mitte gekrümmt und dem Tisch (15) gegenüberliegend zu sein, welche Vorrichtung (1) weiterhin aufweist:
    zusätzliche Antriebsmittel (18), durch die die Platte (27) schwingend um die Mitte der gekrümmten Oberfläche (28) bewegt wird; und
    eine Steuervorrichtung (19), die mit den Antriebsmitteln (17) und den zusätzlichen Antriebsmitteln (18) verbunden ist, wobei die Antriebsmittel (17) und die zusätzlichen Antriebsmittel (18) so durch die Steuervorrichtung (19) gesteuert werden, dass die Platte (27) zu dem Tisch (15) hin vorwärts bewegt werden kann, um zu bewirken, dass die gekrümmte Oberfläche (28) zwischen den Seitenkanten der Kunststofffolie (2) gegen die Kunststofffolie (2) gedrückt wird, die Platte (27) dann durch die zusätzlichen Antriebsmittel (18) schwingend bewegt wird, so dass die gekrümmte Oberfläche (28) in Längsrichtung der Kunststofffolie (2) gerollt werden kann, und die Platte (27) dann von dem Tisch (15) zurückgezogen wird, um im Abstand von der Kunststofffolie (2) gehalten zu werden.
EP09735493.0A 2008-04-24 2009-04-24 Zugvorrichtung für kunststofffolie Not-in-force EP2275246B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008114341 2008-04-24
PCT/JP2009/058211 WO2009131226A1 (ja) 2008-04-24 2009-04-24 プラスチックフィルム延伸装置

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EP2275246A1 EP2275246A1 (de) 2011-01-19
EP2275246A4 EP2275246A4 (de) 2016-08-17
EP2275246B1 true EP2275246B1 (de) 2019-01-30

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JP (3) JP4603092B2 (de)
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CA (1) CA2722357C (de)
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JP5346113B1 (ja) * 2012-10-05 2013-11-20 トタニ技研工業株式会社 プラスチックフィルムの印刷ピッチ矯正装置
JP5923207B2 (ja) * 2014-09-19 2016-05-24 トタニ技研工業株式会社 プラスチックフィルム打ち抜き装置
CN117799150B (zh) * 2024-02-28 2024-05-07 陕西宝昱科技工业股份有限公司 塑料膜拉伸成型设备及塑料膜拉伸成型方法

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JP2010018034A (ja) 2010-01-28
CN102066088A (zh) 2011-05-18
US20130337098A1 (en) 2013-12-19
AU2009238919B2 (en) 2012-11-29
CA2722357A1 (en) 2009-10-29
EP2275246A1 (de) 2011-01-19
US20110038978A1 (en) 2011-02-17
JP2010018035A (ja) 2010-01-28
US9403315B2 (en) 2016-08-02
JP4429381B2 (ja) 2010-03-10
JPWO2009131226A1 (ja) 2011-08-25
JP4603092B2 (ja) 2010-12-22
AU2009238919A1 (en) 2009-10-29
US20160158996A1 (en) 2016-06-09
WO2009131226A1 (ja) 2009-10-29
US9308694B2 (en) 2016-04-12
HK1157283A1 (en) 2012-06-29
CA2722357C (en) 2014-07-08
CN102066088B (zh) 2013-05-22
JP4429380B2 (ja) 2010-03-10
US8517713B2 (en) 2013-08-27
EP2275246A4 (de) 2016-08-17

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